These points are also on the negative side of the x axis, at -pi/4 and -pi/2. When we move along the x axis, notice what happens to the y value. On the left side of zero, tangent is negative. At x=-pi/4, tangent=-1.
The Independent Online. David Cameron may have called a referendum on the EU to blackmail Europe, according to Vladimir Putin. The Russian president also questioned Mr Cameronâs decision to call the vote, as it has caused a âgreat problemâ.
Russia constitution chapter 4 article 81 : 3. âOne person may not hold the position of Russian president for more than two terms in a row.â. So Putin had two terms between 2000 - 2008 and third term from 2012 till 2018. If you ask why 6 years in 2012 instead of 4 - terms were extended from four to six years in 2008, during Dmitry Medvedev's presidency.